Hinge seat mortising jig



Dec. 22, 1953 T. H. BROWN HINGE SEAT MORTISING JIG Filed Aug. 21, 1951 IN VEN TOR. @DDHH B Y A TTO RNE Y Patented Dec. 22,Y 1953 UNITED Y STATESPAT-E OFF 2,663,333, f .-:;-.r.fz:f

HINGE SEAT MoarisING ,ne Y

I Tanner H. Brown, lllonterey,i j

` Application August 21,1951,;Ser-ialnNo,242i8401 *mi* zolaims. (Cri'scribed usually is. approximately one-eighth ofV an inch in depth andextends only through a portion of the width of the door edge which makesit rather difficult .to make a mortise of uniform depth and with asmooth bottom by the use of ordinary hand tools., f Y

In the present invention it is proposed toprovide a comparatively simplejig which facilitates the cutting ofthe mortise, and the use of whichresults in a perfect mortise with a flat and even bottom and straightside and `end walls.

It is further proposed to provide a jig of the character described whichmay readily be applied to the cutting of vsimilar mortises into a doorjamb.

Further objects and advantages of my invention will appear as thespecication proceeds, and the novel features thereof. will be fullydefined in the claims attached hereto.'

The preferred formv of my invention vis illustrated in the accompanyingMdrawing, forming part of this application, in which;

Figure l shows an inside view of my jig, as applied to the edge of adoor, which latter is indicated in dotted lines;

Figure 2, a bottom View of the same jig; and

Figure 3, a section taken along line 37-3 of Figure 1.

While I have shown only the preferred form of my invention, I wish tohave it understood that various changes or modifications may be madewithin the scope of the claims attached hereto without departing fromthe spirit of the invention.

Referring to the drawing in detail, my invention comprises in itsprincipal features, a bar I adapted for placing against the side of thedoor adjacent the edge to be mortised, a flange 2 projecting from thebar across the front edge of the door, means indicated at 3 engageableupon the opposite side of the door' for positioning the jig with respectthereto, fixed cutting blades 4 projecting inwardly from the ange andadapted for hammering into the door edge to define the mortise area, aretractable blade 5 mounted in the bar I and operable for cutting thebottom of the mortise, and a handle 6 for operating the retractableblade.

The bar I is preferably rectangular in crosssection, and suiicientlylongto. .projectbeyond the length zf-thelmortise to becut'atboth-endsi Theflange'.L 2 lmaybe 1formed integral Vwiththe bar I, andprojects'across,the front edge ,oflthe doorfto be mortised Iwhen the bar is .placedagainst the side .of the-door, faslshown in Figure The flange lisfpr'eferably made; of considerable width Yso as to be adapted forusein' connection with a door. jamnlas well as withla'doorledge, and isformed with twgrooves .'I l`ada'pte'dgto'fslidablyreceive short anglesaadapted tobel pushed up against the sides foi, thegdooriIi,OfppOspiti/ion to the bar I for properlyfpositioning thjig`lI.-withrespect to the 'door edge. l`The angles lfnayjbe locked. in adjustedYpositionby meansipf "screws 9 adapted' to ridefslots Ill in the'grooves`.I `and wing nuts I I adapted to tighten,thek screwsfupon theflangejj-f I Y The flange ,is formmadiacelt, th .bar I., andinterm@dilatev the lensili thereof; ,with-2Jv rectngular 'opening I2.slightlylargerA than the mortise to be out,anrtliemar'ein-iof.iheopennevhas anyinsvert I3 ,secured thereon by meansAofgsciws I 4, the inserts havingfth'e cuttingblades '4 formed integraltherewith; theyu'ttne blades projecting beyond the l inner surface vofthe flange l[2. to clorresporicllto ih 'Pthfl' the molftisfe "t0"meretractame-blede '5- is iidabl'e in theiba-I in the plane of thecutting edges of the blades 4, and is of a width corresponding to thelength of the mortise to be cut.

The retractable blade 5 is operated by means of the handle Ii whichnormally lies against the edge of the bar I and may be substantially thesame thickness as the latter but preferably is somewhat longer, asindicated in the drawing.

VThe upper edge of the handle, which is also in the nature of astraightv bar, is made to register with the upper edge of the bar I, andis connected thereto by a link I5 pivoted to both the handle and thebar, as at I6 and I1. The lower end of the handle projects below thelower end of the bar I, for convenient handling, and an intermediateportion of the handle is pivoted to the retractable blade 5, as at I8.

It will be noted that the blade 5 may be retracted by an outward push onthe lower end of the handle 6 and that the blade movement may berectilinear in view of the link connection I5.

The door edge is yshown in the Various views in dotted lines, and isidentified by the numeral I9.

The operation of my invention may be described as follows:

When a mortise is to be cut into the edge of a Y 3 door, the operatorplaces the bar I against the side of the door adjacent the edge, withthe flange 2 projecting across the door edge, and with the blades 4facing the edge in position for cutting the mortise.

The jig is secured in proper position with respect to the door edge byadjustment of the members 8 to cause the latter to bear on the side ofthe door opposite the bar I.

During this positioning 0f the jig With respect to the door, the blade 5is held in retracted position by proper positioning of the handle 6.

Next the operator strikes the insert I3` with a hammer to cause theblades I4 to penetrate the edge of the door to the depth of the desiredmore tise, and thereupon he swings the handle 6 toward the bar I tocause the blade 5 to enter the door edge from the side and to cut thebottom of the mortise. This completes the operation.

t is apparent that the steps dr holding mein; b'es 8 do not need to beadjiisted for eachoper'- ation, but may be' used in the same pdsitio'nas long as the door s to be xr'idrti'sed have the' saine thickness. OntheY otherjhand, they can be ad'- justed fdrddodrs of dieren'tthicknesses, and the width of the harige is such that it allows the stopmembers 8 to be easily adjusted for u'se in connectionwith a door jambor the like.

The blade 5 may have a comparatively narrow and smoothvsudirlg. etinthe, par annee the link connection vI5 hasffsufllcientggive to preventany binding of the blade Within the. bar.

I claim: n

1. A jig for'mortisig adqr edge or the like comprising a bar having aninneredge adapted for placing against the side 'of the door, a flat`flange projecting froml the inner edge of the bai' acoss. the dr edgeand adapted to lie flat against the latter and made lto project beyondmeneer edge, means en the projecting prtion ofthe flange for barig theopposite side of the door edge, the flange Vhavirfig fixed bladesprojecting toward the dor' edge te denne a rectangularv fnorti'sey areaadjacent the bar and to cut the edges ofthe mortise When hamrnered. intothe door', a bottom cutting blade retractable in thebar in the plane ofthe extremities of the edge cutting blades, and means for driving thebottom cutting blade into the door for cutting the bottom of themortise, the latter means comprising a straight handle disposed upon theouter edge of the bar and normally lying 'adjacent thereto, a linkconnection between corresponding ends of the handle and the bar, and apivotal connection between the handle and the bottomv cutting blade.

2. A jig for mortising a door edge or the like comprising a bar havingan inner edge adapted for placing against the side of the door, a hatflange projecting from the inner edge of the bar aerss the door edge andadapted to lie dat against the latter and made to project beyond the doredge, means on the projecting portion -of' the flange frbearing on theopposite side of the door edge, the flange having fixed blades pijtigtoward the door edge to denne a rectangular mortise area adjacent thebar and to cut the edges ofv the mortise when hammered intr)` the dooi,la bottoni 'cutting blade retractable inthe bar in the plane oftheextremities of the edge cutting blades; and means foi' driving thebottom cutting blade into the door for cutting the bottom ofthenrortis'e,` the latter means comprising a straight handle disposedupon the outer edge of the bar and normally lying adjacent thereto, alink c nnection between correspending' ends of the' handle and the bar,and a pivotal connection between the handle and the bottom cuttingblade, andthe free end of the handle projecting beyhd the correspondingend of the bar to facilitate the operation of the handle.

TANNER H. inno-WN.

Referencesk Cited inl the file of this patent UNITED STATES PATENTSNumber Name Date 577,868 Lewis v Mar. 2v, 1897 '761;861 Wagner June '7,1904 '770,261 Carson me-; Sept. 20, i90-l 991,062 Hoglund May 2, 19111,080,310. Wassberg Dec. 2, 1913 2,399,145 Schmidt f Apr. 23, 1946

